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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
1978
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| Online Access: | https://doi.org/10.1594/PANGAEA.770363 |
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| _version_ | 1867170916222369792 |
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| author | Takaoka, Nobuo Nagao, Keisuke |
| author_facet | Takaoka, Nobuo Nagao, Keisuke |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The abundance and isotopic composition of rare gas in the mantle provides an important constraint on the origin and evolution of the Earth's atmosphere. One of sources of such information is basalts which erupted from ocean ridges. Ozima (1975, doi:10.1016/0016-7037(75)90054-X) stated that a high 40Ar/36Ar ratio in the mantle suggests sudden degassing at an early stage of the Earth's evolution. Several authors (Funkhouser et al., 1968, doi:10.1016/S0012-821X(68)80021-4; Darlymple and Moor, 1968, doi:10.1126/science.161.3846.1132) have reported excess 40Ar and high 40Ar/36Ar ratios in rapidly quenched rims of young deep-sea basalts. However, the Ar composition in old ridge basalts was not known. We report here a measurement of the isotopic composition of Ar in old deep-sea basalts. The Glomar Challenger drilled a Cretaceous ocean floor near the southern end of the Bermuda Rise in Deep Sea Drilling Project. The drilled site (Site 417) is on the magnetic anomaly MO which has been estimated to be 108 Myr old. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_770363 |
| institution | PANGAEA |
| language | en |
| publishDate | 1978 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Concentrations and isotopic ratio of Argon in Cretaceous deep-sea basaltic glass of DSDP Hole 51-417D Takaoka, Nobuo Nagao, Keisuke 51-417D; Argon-36; Argon-38/Argon-36; Argon-38/Argon-36 ratio, standard deviation; Argon-40/Argon-36 ratio; Argon-40/Argon-36 ratio, standard deviation; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Leg51; North Atlantic/CONT RISE; ORDINAL NUMBER; Sample code/label The abundance and isotopic composition of rare gas in the mantle provides an important constraint on the origin and evolution of the Earth's atmosphere. One of sources of such information is basalts which erupted from ocean ridges. Ozima (1975, doi:10.1016/0016-7037(75)90054-X) stated that a high 40Ar/36Ar ratio in the mantle suggests sudden degassing at an early stage of the Earth's evolution. Several authors (Funkhouser et al., 1968, doi:10.1016/S0012-821X(68)80021-4; Darlymple and Moor, 1968, doi:10.1126/science.161.3846.1132) have reported excess 40Ar and high 40Ar/36Ar ratios in rapidly quenched rims of young deep-sea basalts. However, the Ar composition in old ridge basalts was not known. We report here a measurement of the isotopic composition of Ar in old deep-sea basalts. The Glomar Challenger drilled a Cretaceous ocean floor near the southern end of the Bermuda Rise in Deep Sea Drilling Project. The drilled site (Site 417) is on the magnetic anomaly MO which has been estimated to be 108 Myr old. |
| title | (Table 1) Concentrations and isotopic ratio of Argon in Cretaceous deep-sea basaltic glass of DSDP Hole 51-417D |
| topic | 51-417D; Argon-36; Argon-38/Argon-36; Argon-38/Argon-36 ratio, standard deviation; Argon-40/Argon-36 ratio; Argon-40/Argon-36 ratio, standard deviation; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Leg51; North Atlantic/CONT RISE; ORDINAL NUMBER; Sample code/label |
| url | https://doi.org/10.1594/PANGAEA.770363 |